Window-ventilator



J. LYNN.

WINDOW VENTILATOR. APPLICATION mu) cm, 1917.

1,393,556. Patented Oct. 11, 1921,

IJIIIIIIIL I a 5/ WITNESSES; E v 7 INVENTOIR. 1 %u Y W I A TTORNEYJI UNITED STATES PATENT o JOHN LYNN, on NEW YORK, N. Y.

.WTNDOW-VENTILATOR. V

Specification. of Letters-Patent.

Patented Oct. .11, 1921 Application filed December 31, 1917. Serial No. 209,634.

city, in the countyof New York, State of New York,-have invented certain newand useful Improvements in Window-Ventilators, of which the following is a specification.

My invention relates to a ventilator formed as a permanent part of the bottom rail of a window sash and in which provision is made for deflecting the entering current of air and causing it to 't ake a direction of travel the reverse of its entering direction so as to partially pocket the air, and to cause it to enter the room in a continuous stream with a substantially constant velocity. The invention will be understood by reference to the accompanying drawings in which Figure l is an elevation of the lower part of a window sash viewed from the inside; Fig. 2 an elevation viewed from the outside; and Fig. 3 a transverse vertical section. Similar reference numerals indicate similar parts in the several views.

Referring to the drawings, the numeral 1 designates the side rails of a window sash, 2 the bottom rail and 3 the glass supported between and upon the rails in the usual way. The bottom rail 2 is cut out along its front, or exposed side, as indicated in section in Fig. 3, to form two sections having sub stantially semi-circular bases 3 and 4, and sides 5 and 6 at right angles to the plane of the front and tangential to the bases. The walls of these sections may be lined with sheet metal, as indicated. Secured to the end walls of the opening is a shield 7, preferably semi-circular in section and located substantially central of the opening with its edge in substantially the same vertical plane with the iii-turned edges of the bases 3 and e, and so that the concave side of the deflector shall be symmetrical with reference to said bases. A sheet of wire gauze 8 is placed over the opening in the rail 2 to filter the entering air.

The bottom rail is also formed with a longitudinal channel 9 the opening into which is between the two bases 3 and 4. This channel is inclined upwardly from the inner edges of said bases and terminates in the upper surface of the rail on the inner side of the glass 3, and its upper part is so formed as to give the entering air an 1n1t1al upward direction of flow and is preferably slightly inclined'toward the glass, as shown. In order to close and open this'channel I provide a shutter-10restingupon a seat 11' formed in the rear part of the rail. This shutter is formed with an openingin which 1s a bushing 12 interiorly threaded and adapted to receive a screw bolt 13. The inner end of said bolt is anchored in an opening in therail on the opposite side of the channel 9 and it is'provided with a suit- As To close it,

able head by which it maybe rotated. shown, the channel 9 is open.

the screw bolt is rotated th'erebycausing the shutter 10 to travel .alongit until ,thejshutter is moved to the position shown by' th'e dotted lines in Fig. 3. 'To open the channel, the bolt 13 is rotatedina reversedirection from that required to move the shutter to its closed position and, if the channel 1s to be fully opened, until the shutter rests upon its seat 11 as indicated by the full lines in Fig. 3.

lVith a bottom rail constructed as above described, the air from the outside enters the opening above and below the shield 7, striking the bases 3 and 4 by which it is deflected, as indicated by the arrows, toward the concave side of the shield 7 and thence into the channel 9 through which it is delivered into the room when the shutter 10 is open. By causing the air to first strike the curved bases 3 and 4 and then to take a direction of flow substantially the reverse of the direction in which it enters, the air is partially pocketed insaid bases and in the concave side of the deflector 7 Its velocity is thus diminished and the admission of the air into the room in sudden gusts is avoided, the air entering in a continuous stream with a substantially constant velocity.

The bottom rail is preferably formed of two pieces secured together in any suitable manner after the cuttlng necessary to form the channel 9 when the parts are assembled.

The construction described provides a form of ventilator permanent with the window itself, and avoids the necessity of extra fixtures upon the sill which more or less interfere with the raising and lowering of the window.

lVhat I claim and desireto secure by Letters Patent of the United States is 1- l. A window having the bottom sash rail formed with a longitudinal opening divided into sections having curved bases and receiving the entering current of air, a shield for directing the entering a1r against the respectivecurved bases, and a channel comb in front of said channel opening and constructed'and arranged to form pockets with said bases.

r 3. A window having the bottom sash rail formed with a longitudinal opening divided into sectionshaving substantially semi-circular bases, a channel leading from between said bases to the inner side of the rail, a semi-circular shield secured in the end walls of said longitudinal opening and having its concave side opposite the opening into said channel, and a shutter for opening and closing said channel.

4. A window having the bottom sash rail formed with a longitudinal opening divided into sections having curved bases and receiving the entering current of air, a channel leading from between said bases to the inner side of the rail, and a curved shield disposed in front of said channel opening, the concave side of said shield facing said curved bases and forming pockets there- 5. A window having the bottom sash rail formed with a longitudinal opening divided into sections having curved bases .and receiving the entering current of air, a channel leading from between said bases to the inner side of the rail, and a curved shield disposed in front of said channel and constructed and arranged to cause the air to be directed from said curved bases in directions opposite to that of the entering air on either side of said shield whereby pockets are formed.

'In testimony whereof I have hereunto signed my name in the presence of two sub-y scribing witnesses.

JOHN LYNN. f

WVitnesses 1 CHAnLnsS. Jonas, E. M. LOCKWOOD. 

